1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Citrus2011 [14]
2 years ago
13

Element X is a radioactive isotope such that every 66 years, its mass

Mathematics
1 answer:
LenKa [72]2 years ago
3 0

Answer:

194.5315427 grams

Step-by-step explanation:

The half-life of element x would be 66 years. So, after 20 years you would have:

.5^(20/66) x 240=0.810548 x 240

        =194.5315427 grams of the element left ......

You might be interested in
Evaluate the function
siniylev [52]
(3*2)^2-(2*2)+5
36-4+5
=37
8 0
3 years ago
Direct variation equation if f(x) varies directly with x and f(x)=-18 when x=3
JulsSmile [24]
F(x)=-6x
Work:
-18÷3=-6
5 0
2 years ago
If $250 is invested at an interest rate of 12% per year, compounded biannually, how much will the investment be worth at the end
Kryger [21]

Answer:

2563

Step-by-step explanation:

Kgr7q wtbej iw ku3yf kuey wuyr icnt gje eruyg eurygb ekuv ekght kicu dkyg

4 0
2 years ago
State two numbers such that the grader number is 75% more than the lesser number
Marianna [84]
75% is equal to 3/4. So the easiest way to do this is to make the smaller number a multiple of 4. Let's say the smaller number is 8. To find the larger number, you must take 75% of 8 and then add it to 8. 1/4 of 8 equals 8 divided by 4, which is 2. Therefore, 3/4 of 8 is 6. 8 + 6 = 14. 

Thus, your two numbers could be 8 and 14. 
3 0
2 years ago
I NEED THIS ASAP!!!! PLZ HELP!!!!! 25 POINTS!!!
Solnce55 [7]

Answer: B

Step-by-step explanation:

6 0
2 years ago
Other questions:
  • How much money all together would it be if 12 children were paying $10 each fo a soccor game
    5·2 answers
  • Math problem please help me<br>​
    10·1 answer
  • Part A: Solve the following system of authentically showing your work: 3x + 2y = 4 4x + 3y = 7.
    7·1 answer
  • Help! I don't know how to do this! I will mark Brainliest!
    14·2 answers
  • what is The _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ of equality allows you to divide both sides of an eq
    8·1 answer
  • Name the angle that are supplements to Angle OPW.
    8·2 answers
  • What's the measure??
    12·2 answers
  • Express 3 log x^2 + 7 log x as a single log
    6·1 answer
  • Please take your time but I really need anyone's help!!!!
    15·2 answers
  • There is still controversy about whether or not Pluto should be considered a planet. Although planets are mainly defined by thei
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!